Controlling apparatus for oil burners



Sept. 17, 1929. E. I. VEITCH ET AL CONTROLLING APPARATUS FOR OIL BURNERS Filed Sept. 2, 1927 0/15 w iw/ l9 &4 u Fig.2. Fig.1.

Patented Sept. 17, 1929 UNITED STATES PATENT oFFice EDWARD I. VEITGH AND GEORGE 1v. BLANGHARD, or PIEDMONT, AL-momma CONTROLLING APPARATUS FOR OIL 'BURNERS Application filed September This invention relates to an electrically operated device for controlling the operation of oil burners.

The invention is primarily designed lZO TM't) vide an apparatus which operates automatically to control the rotor of a rotary oil burner, whereby the same is heated by the admission of the gas thereto, insuring the gasifying and combustion of the oil immediately on the same reachlng the rotor of the burner at the starting of the same. It is also designed to insure the rotation of the rotor for a period of time after the oil flow thereto has been shut off, to discharge any remaining oil flow by centrifugal force therefrom, eliminating the liability of unburned oil depositing in a hard or gummy mass on the rotor head, and reducing to a minimum the clogging of the burner when a perforated or ported rotor is employed; Another of its objects is to provide an automatic means for igniting an oil burner and wherein if the burner does not ignite on its initial operation, the igniting'operation is repeated at intervals until the ignition of the burner is accomplished. A further object is to provide a simple mechanism, capable of being cheaply manufactured and installed at a small cost, which will effectively carry out the previously set forthobjects, and one which is adaptedfor connection with man ual oil burners now in use to provide an automatic control therefor. With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; it being under stood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. t

In the drawings Fig. l is a view in elevation of one embodiment of our invention, this particular disclosure being designed for operating a hydraulicallyactuated gas fired rotor.

2. 1927. Serial No.'217,168.

structure illustrated in Fig. 1. l s

In the drawings, wherein like characters of reference designate corresponding parts-1 is a mounting panel, to the face of which is secured a block 2, the same having formed therein oil, gas and Water channels, hereinafter described. I

The block mounts a cylinder 3 with the base of which communicates a water channel branching from a main water passage 5 extending through the block,the inlet end of which is indicated at'6, and the cylinder relief end at 7. p I

The main water. passage 5 has a valve chamber 8 therein and at a point between the inletchannel and chamber 8 lateral passage 9 branches from the main passage 5 and connects with the water wheel of the conventional type associated with the rotor or plate of the oil burner, not shown.

The block 2 is also provided with oil and gas channels 10 and 11, each connected at one end to a supply under, pressure and at its other end the oil channel is connected with the burner and the gas. channel also communicates with the burner, the latter being not illustrated. I p' lVithin the valve channel 8 is mounted a double faced conical valve 12 of the needle type adapted when moved. downwardly to shut oflithe supply of water into the cylinder 3 and relieve the water pressure in the cylinder through the channel 7. I

The valve 12 when raised closes the relief 7 from the cylinder 3 and opens the water supply 5 to the base of the cylinder through the restricted orificeiA. The valve 12 is carried at the lower end of a stem 14;, slidable in a guide 15, the stem at its upper end carrying adjustable throwcollars 16 between which lies one end of the lever 17. l In the cylinder 3 reciprocates a piston 18 thestem 19 ofwhich carries abody 20 of sufficient weight to cause adownward movement of the piston within the cylinder on a release of the fluid pressure from within the cylinder. The stem 19 carries an arm 21 (ex tended laterally therefrom, the latter moving longitudinally of a rod 22 between stop Fig. 2 is a view in side elevation of the ing means forthe valve 12, and to releasably retain the valve in either of its operated positions an anti-friction roller 29 on the end thereofrides over a pointed projection 30 on a spring held pawl 31. 3 Between the end of arm 21 and collars 23 and 23 are positioned coiled compression springs 32, slidable on the rod 22. I e

w A reciprocatin needle valve controls the passage of water mm the 'b'ranch34 of inlet '6 to the pipe lea'dingto the water wheel, not shown. I

Needle valves 36 and 37 control respectively the flow of gas throughthe channel 11 to the burner, not shown, and the low of oil to the burner through channel 10; The stems ofthe respective valves 33, 36 and '37 operate through guide stems 38, of the conventional type, and extendupwardly from the block 2 in substantially parallelrelation.

Springs 39 act to normally force the valves 36 and 37 toward their seats while the spring 40 acts to normally unseat-the valve 33. A lever 41 overlies the upper end of stem 33 and is actedon by arm 21 on stem 19 during the reciprocation of the piston 18. The stems of valves '36 and 37 at-their .ends pivotally connect respectively with the levers 42 and 43 ivotally mounted one common axis 44 with the lever 43 of a lengthslightly greater than that of lever 42, as clearly illustrated in Fig.

l. The'levers 42 and 43 are operated to throw valves 36 and 37 by the action ota plate 45 pivotally mounted at one endto the upper surface of arm 21, as at 46, with its free end projecting beyond the arm into the path of the levers. The plate is freeto pivotupwardly from the ar1n21 and held from swinging movement to a position below the plane of arm 21 by its contact with the upper surface of the arm.-

, Temperature controlled electric mecha nism is employedjtor operating'the controlling mechanism previously described, and its arrangement is'as-follows Power is preferably taken from a regular 110 voltline through a transformer 46, one

outputterminal of which connects through a lead 47, controlled by a switch 48 with the movable element of a thermostat member 49.

The other transformer output terminal con-' the power source and eliminatingthe thermo-o stat 49 and contacts 52 and 53.

, As assembled inthe drawing, the apparatus as described operates in the following manner I The temperature in the enclosure in which the thermostat 49 is located having dropped below the point ot low setting of the thermostat, contact is made between 49 and 53, cans ing'the current to heat'bar 23, flexing the same 25. This removal enables spring 32 bearing on collar 23 on the rod 22 to depress lever 17 raising valve 12 to the position shown in Figure 1, opening the water supply ,6, and closingthe relief of discharge. This action also causes the o Joosite end or lever 25 to move l I upwardly and overlie the upper end oi bar 27, as in the drawing, where it remains until the enclosure temperature rises above the point of high setting otthe thermostat 49.

35 leading to the water wheel, not shown,

which rotates the burner,

also not shown. Thus. thefirstoperation is torevolve the burner 01 burner rotor. As the piston 18 continues to rise, the plate 45'contacts with the edges of levers 42 and 43 and moves upwardly along the same, throwing the leversto operate or'unseat theirassociated valves 36 and 37. he'va'lve 36 operates preferably slightly in advance of valve 37 to insure the admission of gas for the heating of the burner prior to the admission of oil thereto. The gas flame controlled by. valve is ignited by a pilot flame burning at all times near the burner, and not herein illustrated. The operation of valve 36 in advance of valve' 37 may be accom plishedin many ways, the preferred form being to control the normal position of the lever 42 when the valve is closed, so that its edge will lie slightly in advance of the corresponding edge of lever 43. g I

As the piston 18 reaches approximately its limit of upward movement, plate 45 rides clear of the end of lever .42, permitting spring and moves it from beneath the end of lever- S5 39 to seat valve 36 and shut oil the igniting gas flame of the burner. Plate 45 comes to a point of rest opposite the upper end of lever 43, holding the same outwardly and retaining the oil valve open. At this time the switch blade 51 is moved from contact with member 59 and has made contact with member 58. V

Thus the supply of oil to theburner continues, as does the supply of power medium for operating the burner rotor plate or disk.

As the temperature in the enclosure in which the thermostat 49 is positioned reaches the point of high setting for the thermostat, a circuit is completed through 49 and 52 and coil 54 is heated, outwardly flexing bar 27, withdrawing its end from beneath lever 25. The pressure of spring 32 against the upper collar 23 on red 22 upwardly moves the rod, causing lever 17 to move, moving roller 29 over projection 30. This operation also moves the right end of lever upwardly over bar 28 to overlie the same. This operation depresses valve 12, shutting oil inlet 5 z to the cylinder and opening the relief connection between the cylinder and 7. The weight 20 causes a downward movement of piston 18 and stem 19, resulting in plate pivoting on its fulcrum 46, permittinga gradual movement of lever 43 to the right, and the plate riding on the end of lever 42, The oil flow is thus shut oil to the burner and a short I time thereafter, when the piston reaches its lowermost point, the lever 41 is depressed by arm 21 against the action of spring 40 and shuts off the actating power source to the burner rotor, but this does not take place until after the oil supply to this same member has been shut oil, insuring the discharge of all oil from the rotor.

A safety circuit to insure the repeating of the burner igniting operation until such time as the burner ignites is provided, and the same operates in thefollowing manner.

In the stack 60 through which products of combustion are carried, is positioned a thermostat 61 of the type in which the temperature controlled element 62carries a movable contact terminal 63, which when the stack draft is cold engages with a contact 64 from which extends a lead 64 cut into the line connecting 52 and 54. A terminal 65 is engaged by the movable contact when the latter is pressed by the member 63, and from the terminal 65 extends a lead 66 connecting with one output take-off from the transformer between the transformer 46 and switch .48.

Thus should the piston 18 rise opening valves 36 and 37 and the burner "fail to ignite, the circuit will remain complete, due to a cool stack through 64, 65, 58 and 51, as the lever 43 would be in elevated position. This circuit would heat coil 54 and actuate bar 27 to permit the piston to lower, controlling the various parts during its movement. The thermostat 49 would be still in contact with 53,

as the room temperature had not risen, and

consequently the burner startingand igniting operation would again take place; 'Assoon as sufiicient heat rises in stack 60, member 61 we claim 1. A mechanism for controllin theo era-- tion or" a rotary oil burner, comprising an oil valve for controlling the supply of oilto the burner, a gas valve for controlling the sup 70 is'contracted, breaking this auxiliary circuit.

the starting of the burner to first open said A power valve, then open saidgas valve, and e lastly open said oil valve, permittingthe gas valve to close wit-h said powerand oil valves remaining open and on the extinguishing of the burner to first close the oil valve and lastly close the power valve.

2. A mechanism for controlling the operation of a rotary oil burner, comprising oil and gas channels connecting with the oil burner, valves controlling the passageof oil and gas therethrough, a hydraulic power supplyconnecting with the burner for rotating the same, a valve for controlling the hydraulic power supply to the burner, a cylinder and piston, connection between the hydraulic power supply and thecylinder, a relief connection extending exteriorly of the cylinder, a valve controlling the passage of power medium selectively through said connections to cause the operation of the piston, electrically releasable means for retaining said valve in its operative position, means associated with the oil and gas valves and the valve controlling the powersupply to the burner and operated by the reciprocation of the piston to cause the opening of said valve admitting power supply to the burner prior to the operationof the oil valve and the gas valve.

3. l mechanism for controlling the operation of a rotary oil burner, comprising a valve controlled channel through which oil is fed to I a controlling valve toractuating said means, i

a temperature controlled main electric circuit for operating said control valve and for retaining the same in its operated position, c

4. A mechansm. for controlling the opera tion of a rotary oil burner, comprising a valve controlled channel through which oil is fed to the burner, a power supply valve means for controllling the delivery of a portion of the power from said supply to theburner for its rotation, means actuated by a portion of the power from said supply for opening said power and oil valves in sequence, a controlling valve for actuating said means, a temperature control main electric circuit for operatlng said'control Valve and for retaimng the same in lts operated position, an auxiliary circuit connected with said main circuit,

means [Within said auxiliary circuit operated by the heat of combustion from the burner for I causing successive operations of said control valve'to open and close said power and oil valves until heat is generated by said burner.

In testimony whereof We have signed our names to this specification.

EDWARD I. VEITCH. v GEORGE N. BLANOHARD. 

